(English Medium) ICSE Class 10 - CISCE Important Questions

State your observations when ammonium hydroxide solution is added drop by drop and then in excess to each of the following solutions :
1) Copper sulphate solution

2) Zinc sulfate solution.

Identify the cations in the following case:

NaOH solution, when added to the Solution (A), gives a reddish brown precipitate

Choose the most appropriate answer from the following list of oxides which fit the description.

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

A basic oxide.

Choose the most appropriate answer from the following list of oxides which fit the description

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

An oxide which dissolves in water forming an acid

Choose the most appropriate answer from the following list of oxides which fit the description

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

An amphoteric oxide

State your observation When excess sodium hydroxide is added to calcium nitrate solution

Name the kind of particles present in sodium hydroxide solution.

State one relevant observation for the following.

Lead nitrate solution is treated with sodium hydroxide solution dropwise till it is excess.

A compound X (having the vinegar-like smell) when treated with ethanol in the presence of the acid Z, gives a compound Y which has a fruity smell.

The reaction is:

1) Identify Y and Z.

2) Write the structural formula of X.

3) Name the above reaction.

Give a chemical test to distinguish between the given pairs of chemicals:

Lead nitrate solution and Zinc nitrate solution

The hydroxide soluble in excess of ammonium hydroxide is ______.

______ is a white precipitate that is soluble in excess of Ammonium hydroxide solution.

Identify the cation in the following case:

Ammonium hydroxide solution when added to Solution B gives a white precipitate which does not dissolve in excess of ammonium hydroxide solution.

Identify the cation in the following case:

Sodium hydroxide solution when added to Solution C gives a white precipitate which is insoluble in excess of sodium hydroxide solution.

State one relevant observation for the following:

To the copper nitrate solution, initially, few drops of sodium hydroxide solution is added and then added in excess.

An amphoteric oxide.

The metal hydroxide which reacts with both acids and alkalis to form salt and water is ______.

Rita was given an unknown salt for identification. She prepared a solution of the salt and divided it into two parts.

• To the first part of the salt solution, she added a few drops of ammonium hydroxide and obtained a reddish-brown precipitate.
• To the second part of the salt solution, she added a few drops of silver nitrate solution and obtained a white precipitate.

Name:

1. The cation present and
2. The anion present in the salt given for identification.

Aqueous lead (II) nitrate can be distinguished from aqueous zinc nitrate by adding any of the following solutions in excess, except:

Which of the following about oxides is correct?